Assertion `0' failed in Protocol::end_statement() upon KILL_SERVER

2019-09-23  1:50:18 139912696772352 [Note] /data/bld/10.2-debug-nightly/bin/mysqld (initiated by: root[root] @ localhost [127.0.0.1]): Normal shutdown

mysqld: /data/src/10.2/sql/protocol.cc:598: void Protocol::end_statement(): Assertion `0' failed.

190923  1:50:18 [ERROR] mysqld got signal 6 ;

#7  0x00007f400e189f12 in __GI___assert_fail (assertion=0x562ca44fc020 "0", file=0x562ca44fbdc0 "/data/src/10.2/sql/protocol.cc", line=598, function=0x562ca44fc870 <Protocol::end_statement()::__PRETTY_FUNCTION__> "void Protocol::end_statement()") at assert.c:101

#8  0x0000562ca39b668c in Protocol::end_statement (this=0x7f3f7c0010b8) at /data/src/10.2/sql/protocol.cc:598

#9  0x0000562ca3a7db1f in dispatch_command (command=COM_STMT_PREPARE, thd=0x7f3f7c000b00, packet=0x7f3f7c0087c1 "CREATE TABLE `D` LIKE `t9` /* QNO 19406 CON_ID 19 */ ", packet_length=53, is_com_multi=false, is_next_command=false) at /data/src/10.2/sql/sql_parse.cc:2388

#10 0x0000562ca3a7a9c1 in do_command (thd=0x7f3f7c000b00) at /data/src/10.2/sql/sql_parse.cc:1384

#11 0x0000562ca3bcfb83 in do_handle_one_connection (connect=0x562ca6a32c80) at /data/src/10.2/sql/sql_connect.cc:1336

#12 0x0000562ca3bcf8ee in handle_one_connection (arg=0x562ca6a32c80) at /data/src/10.2/sql/sql_connect.cc:1241

#13 0x00007f400fcfe4a4 in start_thread (arg=0x7f3ff69be700) at pthread_create.c:456

#14 0x00007f400e246d0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Trying to get some variables.

Some pointers may be invalid and cause the dump to abort.

Query (0x0): 

Connection ID (thread ID): 19

Status: KILL_SERVER

git clone https://github.com/MariaDB/randgen --branch mdev17539 rqg-mdev17539

cd rqg-mdev17539

perl ./runall-trials.pl --trials=10 --output='Protocol::end_statement' --grammar=mdev17539.yy --scenario=Restart --ps-protocol --threads=6 --duration=200 --gendata-advanced --vardir=/dev/shm/vardir --basedir=/data/bld/10.2